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1.letfbethefunctiongivenbyf(x)=2e^(4x^2).forwhatvalueofxistheslopeofthelinetangenttothegraphoffat(x,f(x))equaltoA.0.618B.0.276C.0.318D.0.342E.0.5512.arailroadtrackandaroadcrossatnightangles.anobserverstands
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1.letfbethefunctiongivenbyf(x)=2e^(4x^2).forwhatvalueofxistheslopeofthelinetangenttothegraphoffat(x,f(x))equalto

A.0.618B.0.276C.0.318D.0.342E.0.551

2.arailroadtrackandaroadcrossatnightangles.anobserverstandsontheroad70msouthofthecrossingandwatchesaneastboundtraintravelingat60m/s.athowmanymeterspersecondisthetrainmovingawayfromtheobserver4secondsafteritpassesthroughtheintersection?

A.57.60B.57.88C.59.20D.60.00E.67.40

3.ifthederivateoffisgivenbyf'(x)=e^x-3x^2,atwhichofthefollowingvaluesofxdoesfhavearelativemaxvalue?

A.-0.46B.0.20C.0.91D.0.95E.3.73

4.Attimet≥0,theaccelerationofaparticlemovingonthex-axisisaa(t)=t+sint.att=0,thevelocityoftheparticleis-2.forwhatvalueoftwillthevelocityoftheparticlebezero?

A.1.02B.1.48C.1.85D.2.81E.3.14

戴加满回答:
  1.letfbethefunctiongivenbyf(x)=2e^(4x^2).forwhatvalueofxistheslopeofthelinetangenttothegraphoffat(x,f(x))equaltoA.0.618B.0.276C.0.318D.0.342E.0.551【Solution】:df/dx...
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